SH7059 Datasheet, PDF (894/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

25. ROM (SH7059)
Table 25.26 AC Characteristics in Auto-Erase Mode
Condition: V_CC = 3.3 V ± 0.3 V, V_SS = 0 V, T_a = 25°C ± 5°C
Code
Symbol
Min
Command write cycle
t_nxtc
20
CE hold time
t_ceh
0
CE setup time
t_ces
0
Data hold time
t_dh
50
Data setup time
t_ds
50
Programming pulse width
t_wep
70
Status polling start time
t_ests
1
Status polling access time
t_spa
Memory erase time
t_erase
—
Erase setup time
t_ens
100
Erase end setup time
t_enh
100
WE rise time
t_r
WE fall time
t_f
Max
150
6 × t_E
30
30
Unit Note
µs
ns
ns
ns
ns
ns
ms
ns
s
t_E: Refer to section 29.5, Flash
Memory Characteristics
ns
ns
ns
ns
FWE
A21-A0
CE
OE
WE
I/O7
I/O6
I/O5-I/O0
t_ens t_ces
t_ceh t_nxtc
t_enh
t_nxtc
t_wep
tf
tr
t_ests
t_spa
t_ds
t_dh
H'20 or H'25
t_erase
Erase end
identification
signal
Erase normal
end confirmation
signal
H'20 or H'25
H'00
Figure 25.37 Timing in Auto-Erase Mode
Rev.3.00 Mar. 12, 2008 Page 804 of 948
REJ09B0177-0300